Funding for this research was provided by:
Medical University of Warsaw
Article History
Received: 10 April 2020
Accepted: 13 October 2020
First Online: 25 November 2020
Compliance with ethical guidelines
:
: E. Kalina, M. Zadurska and B. Górski declare: None of the authors has financial or nonfinancial interests that are directly or indirectly related to the work submitted for publication.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. This study was reviewed and approved by the Bioethics Committee of Medical University of Warsaw, Poland (KB/236/2014). Written informed consent to participate and for publication was obtained from all individual participants included in the study or their parents/legally authorized representatives [LAR] in the case of children under 18.